overview of plant structure
DESCRIPTION
TRANSCRIPT
![Page 1: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/1.jpg)
CHAPTER III:
OVERVIEW OF PLANT
STRUCTURE
![Page 2: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/2.jpg)
TOPIC:An Overview of Vascular
Plant Organs
BY : Patricia Clariza Santos MLS-1D ( Group II)
![Page 3: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/3.jpg)
Organ consist of several types of tissues adapted as a group to perform a particular functions.
Vascular plants have three organs:
ROOTS
STEMS
LEAVES
![Page 4: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/4.jpg)
Bryophytes and some seedless vascular plants have structures that can be called:-“stemlike”-“leaflike”-“rootlike”But not considered to be true stems, leaves and roots.
![Page 5: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/5.jpg)
The list of plants is much shorter than the list of animal organs. While some botanists refer to reproductive structures such as :
- SEEDS- CONES- FLOWER as (organs)
Most reserve the term solely for stems, leaves and roots.
![Page 6: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/6.jpg)
Stems position leaves
for maximum
photosynthesis
![Page 7: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/7.jpg)
Photosynthesis – is the process by which plants certain other organisms use solar energy to make their own food by transforming carbon dioxide and water into sugars that store chemical energy.
Stem is any part of a plant that supports leaves or reproductive structures.
![Page 8: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/8.jpg)
![Page 9: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/9.jpg)
BRANCHES
![Page 10: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/10.jpg)
Leaves function in both
photosynthesis and
transpiration
![Page 11: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/11.jpg)
Leaf or a leaves – is the main photosynthetic organ of modern plants.
Cacti – most photosynthetic plant that occurs in the thick stems, which stores water.
![Page 12: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/12.jpg)
![Page 13: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/13.jpg)
Some pressure is a “push” from the roots, but a “pull” from the leaves that is the main force that moves water in most plant. This “pull” come from the loss of water through the pores in leaves.
![Page 14: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/14.jpg)
Transpiration – the evaporation of water from the plants, pulls water and mineral nutrients up from the roots to the leaves.
- The chemistry of water helps explain how transpiration moves large amounts of water through the plants.
![Page 15: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/15.jpg)
Roots anchor the plant
and absorb water and
minerals
![Page 16: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/16.jpg)
Roots have two main function :
- Anchoring the plant in the soil-Absorbing water and minerals
The absorption takes place only near the very tips of the roots, through trichomes.
![Page 17: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/17.jpg)
Root Hairs
Which means the tiny extensions of root epidermal cells that greatly increase the amount of root surface area.
- In addition to anchorage and absorption, many roots store food for the plant.
![Page 18: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/18.jpg)
Even though roots frequently store food, they do not actually produce it. Because they are usually NON-PHOTOSYNTHETIC and in fact usually grow away from the light.
![Page 19: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/19.jpg)
Vascular tissue system continues between :
Roots
Stem
Leaves
Needs sugar and other organic nutrients produced in leaves.
While leaves and stem needs water and minerals obtained by the roots.
Xylem carries water and minerals from the roots.
Phloem carries food from the leaves to the rest of the plant.
![Page 20: overview of plant structure](https://reader035.vdocuments.us/reader035/viewer/2022062511/54b958204a795998058b4606/html5/thumbnails/20.jpg)